Noise is a public health problem.
We're measuring it.

TrueNoise was founded by Marty Krizan, a resident of Ashbrook in Severn, Maryland — a neighborhood directly under one of the busiest departure corridors at Baltimore/Washington International Airport. Like many of his neighbors, Marty noticed the noise. Unlike most, he decided to measure it.

What started as curiosity became a rigorous measurement project. Using a calibrated iOS app, real-time ADS-B aircraft tracking, and a psychoacoustic analysis pipeline grounded in ISO and DIN standards, TrueNoise captures not just how loud aircraft are — but how that noise affects the human body. Loudness, sharpness, annoyance, onset rate, and recovery deficit are all measured and mapped to peer-reviewed health research.

TrueNoise's first project is aircraft noise — the most pervasive and well-documented source of community noise harm. The measurement methodology is grounded in international psychoacoustic standards that apply equally to road traffic, rail, and industrial noise, and the platform is designed to grow in that direction. But for now, the focus is on getting the aircraft noise dataset right.

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  Rigorous methodology. Every measurement follows published international standards — ISO 532-1 for loudness, DIN 45692 for sharpness, IEC 61672 for sound level measurement. Our equipment has been validated against a Type 2 reference meter. We don't guess.
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  Published evidence, not opinion. Every health claim on this site is sourced to peer-reviewed epidemiological research — HYENA, RANCH, ANASE, WHO guidelines. We connect measurements to consequences that scientists have already documented.
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  Open data. All raw observations are freely downloadable. Researchers, journalists, advocates, and regulators are welcome to use the data. We ask only for attribution.
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  Independence. TrueNoise is not affiliated with any airport, airline, government agency, or advocacy organization. We have no financial relationship with any party that has an interest in the outcome of our measurements. The data is what it is.
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  Collaboration over confrontation. We believe airlines, airports, and regulators are capable partners in solving this problem. Our goal is to provide the independent evidence base that supports constructive, collegial dialogue — and to work with the industry toward solutions, not against it.

Whether you want to contribute measurements, ask about the methodology, explore a research collaboration, or simply ask a question — we want to hear from you. Your email address stays private and will never be shared.